1 /*
2 * Copyright 2002-2008 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 package sun.jvm.hotspot.debugger.linux;
26
27 import sun.jvm.hotspot.debugger.*;
28
29 class LinuxAddress implements Address {
30 protected LinuxDebugger debugger;
31 protected long addr;
32
33 LinuxAddress(LinuxDebugger debugger, long addr) {
34 this.debugger = debugger;
35 this.addr = addr;
36 }
37
38 //
39 // Basic Java routines
40 //
41
42 public boolean equals(Object arg) {
43 if (arg == null) {
44 return false;
45 }
46
47 if (!(arg instanceof LinuxAddress)) {
48 return false;
49 }
50
51 return (addr == ((LinuxAddress) arg).addr);
52 }
53
54 public int hashCode() {
55 // FIXME: suggestions on a better hash code?
56 return (int) addr;
57 }
58
59 public String toString() {
60 return debugger.addressValueToString(addr);
61 }
62
63 //
64 // C/C++-related routines
65 //
66
67 public long getCIntegerAt(long offset, long numBytes, boolean isUnsigned)
68 throws UnalignedAddressException, UnmappedAddressException {
69 return debugger.readCInteger(addr + offset, numBytes, isUnsigned);
70 }
71
72 public Address getAddressAt(long offset)
73 throws UnalignedAddressException, UnmappedAddressException {
74 return debugger.readAddress(addr + offset);
75 }
76
77 public Address getCompOopAddressAt(long offset)
78 throws UnalignedAddressException, UnmappedAddressException {
79 return debugger.readCompOopAddress(addr + offset);
80 }
81
82 //
83 // Java-related routines
84 //
85
86 public boolean getJBooleanAt(long offset) throws UnalignedAddressException, UnmappedAddressException {
87 return debugger.readJBoolean(addr + offset);
88 }
89
90 public byte getJByteAt(long offset) throws UnalignedAddressException, UnmappedAddressException {
91 return debugger.readJByte(addr + offset);
92 }
93
94 public char getJCharAt(long offset) throws UnalignedAddressException, UnmappedAddressException {
95 return debugger.readJChar(addr + offset);
96 }
97
98 public double getJDoubleAt(long offset) throws UnalignedAddressException, UnmappedAddressException {
99 return debugger.readJDouble(addr + offset);
100 }
101
102 public float getJFloatAt(long offset) throws UnalignedAddressException, UnmappedAddressException {
103 return debugger.readJFloat(addr + offset);
104 }
105
106 public int getJIntAt(long offset) throws UnalignedAddressException, UnmappedAddressException {
107 return debugger.readJInt(addr + offset);
108 }
109
110 public long getJLongAt(long offset) throws UnalignedAddressException, UnmappedAddressException {
111 return debugger.readJLong(addr + offset);
112 }
113
114 public short getJShortAt(long offset) throws UnalignedAddressException, UnmappedAddressException {
115 return debugger.readJShort(addr + offset);
116 }
117
118 public OopHandle getOopHandleAt(long offset)
119 throws UnalignedAddressException, UnmappedAddressException, NotInHeapException {
120 return debugger.readOopHandle(addr + offset);
121 }
122
123 public OopHandle getCompOopHandleAt(long offset)
124 throws UnalignedAddressException, UnmappedAddressException, NotInHeapException {
125 return debugger.readCompOopHandle(addr + offset);
126 }
127
128 // Mutators -- not implemented for now (FIXME)
129 public void setCIntegerAt(long offset, long numBytes, long value) {
130 throw new DebuggerException("Unimplemented");
131 }
132 public void setAddressAt(long offset, Address value) {
133 throw new DebuggerException("Unimplemented");
134 }
135 public void setJBooleanAt (long offset, boolean value)
136 throws UnmappedAddressException, UnalignedAddressException {
137 throw new DebuggerException("Unimplemented");
138 }
139 public void setJByteAt (long offset, byte value)
140 throws UnmappedAddressException, UnalignedAddressException {
141 throw new DebuggerException("Unimplemented");
142 }
143 public void setJCharAt (long offset, char value)
144 throws UnmappedAddressException, UnalignedAddressException {
145 throw new DebuggerException("Unimplemented");
146 }
147 public void setJDoubleAt (long offset, double value)
148 throws UnmappedAddressException, UnalignedAddressException {
149 throw new DebuggerException("Unimplemented");
150 }
151 public void setJFloatAt (long offset, float value)
152 throws UnmappedAddressException, UnalignedAddressException {
153 throw new DebuggerException("Unimplemented");
154 }
155 public void setJIntAt (long offset, int value)
156 throws UnmappedAddressException, UnalignedAddressException {
157 throw new DebuggerException("Unimplemented");
158 }
159 public void setJLongAt (long offset, long value)
160 throws UnmappedAddressException, UnalignedAddressException {
161 throw new DebuggerException("Unimplemented");
162 }
163 public void setJShortAt (long offset, short value)
164 throws UnmappedAddressException, UnalignedAddressException {
165 throw new DebuggerException("Unimplemented");
166 }
167 public void setOopHandleAt (long offset, OopHandle value)
168 throws UnmappedAddressException, UnalignedAddressException {
169 throw new DebuggerException("Unimplemented");
170 }
171
172 //
173 // Arithmetic operations -- necessary evil.
174 //
175
176 public Address addOffsetTo (long offset) throws UnsupportedOperationException {
177 long value = addr + offset;
178 if (value == 0) {
179 return null;
180 }
181 return new LinuxAddress(debugger, value);
182 }
183
184 public OopHandle addOffsetToAsOopHandle(long offset) throws UnsupportedOperationException {
185 long value = addr + offset;
186 if (value == 0) {
187 return null;
188 }
189 return new LinuxOopHandle(debugger, value);
190 }
191
192 /** (FIXME: any signed/unsigned issues? Should this work for
193 OopHandles?) */
194 public long minus(Address arg) {
195 if (arg == null) {
196 return addr;
197 }
198 return addr - ((LinuxAddress) arg).addr;
199 }
200
201 // Two's complement representation.
202 // All negative numbers are larger than positive numbers.
203 // Numbers with the same sign can be compared normally.
204 // Test harness is below in main().
205
206 public boolean lessThan (Address a) {
207 if (a == null) {
208 return false;
209 }
210 LinuxAddress arg = (LinuxAddress) a;
211 if ((addr >= 0) && (arg.addr < 0)) {
212 return true;
213 }
214 if ((addr < 0) && (arg.addr >= 0)) {
215 return false;
216 }
217 return (addr < arg.addr);
218 }
219
220 public boolean lessThanOrEqual (Address a) {
221 if (a == null) {
222 return false;
223 }
224 LinuxAddress arg = (LinuxAddress) a;
225 if ((addr >= 0) && (arg.addr < 0)) {
226 return true;
227 }
228 if ((addr < 0) && (arg.addr >= 0)) {
229 return false;
230 }
231 return (addr <= arg.addr);
232 }
233
234 public boolean greaterThan (Address a) {
235 if (a == null) {
236 return true;
237 }
238 LinuxAddress arg = (LinuxAddress) a;
239 if ((addr >= 0) && (arg.addr < 0)) {
240 return false;
241 }
242 if ((addr < 0) && (arg.addr >= 0)) {
243 return true;
244 }
245 return (addr > arg.addr);
246 }
247
248 public boolean greaterThanOrEqual(Address a) {
249 if (a == null) {
250 return true;
251 }
252 LinuxAddress arg = (LinuxAddress) a;
253 if ((addr >= 0) && (arg.addr < 0)) {
254 return false;
255 }
256 if ((addr < 0) && (arg.addr >= 0)) {
257 return true;
258 }
259 return (addr >= arg.addr);
260 }
261
262 public Address andWithMask(long mask) throws UnsupportedOperationException {
263 long value = addr & mask;
264 if (value == 0) {
265 return null;
266 }
267 return new LinuxAddress(debugger, value);
268 }
269
270 public Address orWithMask(long mask) throws UnsupportedOperationException {
271 long value = addr | mask;
272 if (value == 0) {
273 return null;
274 }
275 return new LinuxAddress(debugger, value);
276 }
277
278 public Address xorWithMask(long mask) throws UnsupportedOperationException {
279 long value = addr ^ mask;
280 if (value == 0) {
281 return null;
282 }
283 return new LinuxAddress(debugger, value);
284 }
285
286
287 //--------------------------------------------------------------------------------
288 // Internals only below this point
289 //
290
291 long getValue() {
292 return addr;
293 }
294
295
296 private static void check(boolean arg, String failMessage) {
297 if (!arg) {
298 System.err.println(failMessage + ": FAILED");
299 System.exit(1);
300 }
301 }
302
303 // Test harness
304 public static void main(String[] args) {
305 // p/n indicates whether the interior address is really positive
306 // or negative. In unsigned terms, p1 < p2 < n1 < n2.
307
308 LinuxAddress p1 = new LinuxAddress(null, 0x7FFFFFFFFFFFFFF0L);
309 LinuxAddress p2 = (LinuxAddress) p1.addOffsetTo(10);
310 LinuxAddress n1 = (LinuxAddress) p2.addOffsetTo(10);
311 LinuxAddress n2 = (LinuxAddress) n1.addOffsetTo(10);
312
313 // lessThan positive tests
314 check(p1.lessThan(p2), "lessThan 1");
315 check(p1.lessThan(n1), "lessThan 2");
316 check(p1.lessThan(n2), "lessThan 3");
317 check(p2.lessThan(n1), "lessThan 4");
318 check(p2.lessThan(n2), "lessThan 5");
319 check(n1.lessThan(n2), "lessThan 6");
320
321 // lessThan negative tests
322 check(!p1.lessThan(p1), "lessThan 7");
323 check(!p2.lessThan(p2), "lessThan 8");
324 check(!n1.lessThan(n1), "lessThan 9");
325 check(!n2.lessThan(n2), "lessThan 10");
326
327 check(!p2.lessThan(p1), "lessThan 11");
328 check(!n1.lessThan(p1), "lessThan 12");
329 check(!n2.lessThan(p1), "lessThan 13");
330 check(!n1.lessThan(p2), "lessThan 14");
331 check(!n2.lessThan(p2), "lessThan 15");
332 check(!n2.lessThan(n1), "lessThan 16");
333
334 // lessThanOrEqual positive tests
335 check(p1.lessThanOrEqual(p1), "lessThanOrEqual 1");
336 check(p2.lessThanOrEqual(p2), "lessThanOrEqual 2");
337 check(n1.lessThanOrEqual(n1), "lessThanOrEqual 3");
338 check(n2.lessThanOrEqual(n2), "lessThanOrEqual 4");
339
340 check(p1.lessThanOrEqual(p2), "lessThanOrEqual 5");
341 check(p1.lessThanOrEqual(n1), "lessThanOrEqual 6");
342 check(p1.lessThanOrEqual(n2), "lessThanOrEqual 7");
343 check(p2.lessThanOrEqual(n1), "lessThanOrEqual 8");
344 check(p2.lessThanOrEqual(n2), "lessThanOrEqual 9");
345 check(n1.lessThanOrEqual(n2), "lessThanOrEqual 10");
346
347 // lessThanOrEqual negative tests
348 check(!p2.lessThanOrEqual(p1), "lessThanOrEqual 11");
349 check(!n1.lessThanOrEqual(p1), "lessThanOrEqual 12");
350 check(!n2.lessThanOrEqual(p1), "lessThanOrEqual 13");
351 check(!n1.lessThanOrEqual(p2), "lessThanOrEqual 14");
352 check(!n2.lessThanOrEqual(p2), "lessThanOrEqual 15");
353 check(!n2.lessThanOrEqual(n1), "lessThanOrEqual 16");
354
355 // greaterThan positive tests
356 check(n2.greaterThan(p1), "greaterThan 1");
357 check(n2.greaterThan(p2), "greaterThan 2");
358 check(n2.greaterThan(n1), "greaterThan 3");
359 check(n1.greaterThan(p1), "greaterThan 4");
360 check(n1.greaterThan(p2), "greaterThan 5");
361 check(p2.greaterThan(p1), "greaterThan 6");
362
363 // greaterThan negative tests
364 check(!p1.greaterThan(p1), "greaterThan 7");
365 check(!p2.greaterThan(p2), "greaterThan 8");
366 check(!n1.greaterThan(n1), "greaterThan 9");
367 check(!n2.greaterThan(n2), "greaterThan 10");
368
369 check(!p1.greaterThan(n2), "greaterThan 11");
370 check(!p2.greaterThan(n2), "greaterThan 12");
371 check(!n1.greaterThan(n2), "greaterThan 13");
372 check(!p1.greaterThan(n1), "greaterThan 14");
373 check(!p2.greaterThan(n1), "greaterThan 15");
374 check(!p1.greaterThan(p2), "greaterThan 16");
375
376 // greaterThanOrEqual positive tests
377 check(p1.greaterThanOrEqual(p1), "greaterThanOrEqual 1");
378 check(p2.greaterThanOrEqual(p2), "greaterThanOrEqual 2");
379 check(n1.greaterThanOrEqual(n1), "greaterThanOrEqual 3");
380 check(n2.greaterThanOrEqual(n2), "greaterThanOrEqual 4");
381
382 check(n2.greaterThanOrEqual(p1), "greaterThanOrEqual 5");
383 check(n2.greaterThanOrEqual(p2), "greaterThanOrEqual 6");
384 check(n2.greaterThanOrEqual(n1), "greaterThanOrEqual 7");
385 check(n1.greaterThanOrEqual(p1), "greaterThanOrEqual 8");
386 check(n1.greaterThanOrEqual(p2), "greaterThanOrEqual 9");
387 check(p2.greaterThanOrEqual(p1), "greaterThanOrEqual 10");
388
389 // greaterThanOrEqual negative tests
390 check(!p1.greaterThanOrEqual(n2), "greaterThanOrEqual 11");
391 check(!p2.greaterThanOrEqual(n2), "greaterThanOrEqual 12");
392 check(!n1.greaterThanOrEqual(n2), "greaterThanOrEqual 13");
393 check(!p1.greaterThanOrEqual(n1), "greaterThanOrEqual 14");
394 check(!p2.greaterThanOrEqual(n1), "greaterThanOrEqual 15");
395 check(!p1.greaterThanOrEqual(p2), "greaterThanOrEqual 16");
396
397 System.err.println("LinuxAddress: all tests passed successfully.");
398 }
399 }